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公开(公告)号：US3347257A
公开(公告)日：1967-10-17
申请号：US39819564
申请日：1964-09-22
Applicant: INT BASIC ECONOMY CORP
Inventor： GLEASON JR WILLIAM J , ZIES CARL W
IPC: F16T1/16
CPC classification number: F16T1/165 , Y10T137/304
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